pass4.c revision 7585 
1/*
2 * Copyright (c) 1980, 1986, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by the University of
16 *	California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#ifndef lint
35static const char sccsid[] = "@(#)pass4.c	8.1 (Berkeley) 6/5/93";
36#endif /* not lint */
37
38#include <sys/param.h>
39#include <sys/time.h>
40#include <ufs/ufs/dinode.h>
41#include <ufs/ffs/fs.h>
42#include <stdlib.h>
43#include <string.h>
44#include "fsck.h"
45
46int	pass4check();
47
48void
49pass4()
50{
51	register ino_t inumber;
52	register struct zlncnt *zlnp;
53	struct dinode *dp;
54	struct inodesc idesc;
55	int n;
56
57	bzero((char *)&idesc, sizeof(struct inodesc));
58	idesc.id_type = ADDR;
59	idesc.id_func = pass4check;
60	for (inumber = ROOTINO; inumber <= lastino; inumber++) {
61		idesc.id_number = inumber;
62		switch (statemap[inumber]) {
63
64		case FSTATE:
65		case DFOUND:
66			n = lncntp[inumber];
67			if (n)
68				adjust(&idesc, (short)n);
69			else {
70				for (zlnp = zlnhead; zlnp; zlnp = zlnp->next)
71					if (zlnp->zlncnt == inumber) {
72						zlnp->zlncnt = zlnhead->zlncnt;
73						zlnp = zlnhead;
74						zlnhead = zlnhead->next;
75						free((char *)zlnp);
76						clri(&idesc, "UNREF", 1);
77						break;
78					}
79			}
80			break;
81
82		case DSTATE:
83			clri(&idesc, "UNREF", 1);
84			break;
85
86		case DCLEAR:
87			dp = ginode(inumber);
88			if (dp->di_size == 0) {
89				clri(&idesc, "ZERO LENGTH", 1);
90				break;
91			}
92			/* fall through */
93		case FCLEAR:
94			clri(&idesc, "BAD/DUP", 1);
95			break;
96
97		case USTATE:
98			break;
99
100		default:
101			errexit("BAD STATE %d FOR INODE I=%d",
102			    statemap[inumber], inumber);
103		}
104	}
105}
106
107int
108pass4check(idesc)
109	register struct inodesc *idesc;
110{
111	register struct dups *dlp;
112	int nfrags, res = KEEPON;
113	daddr_t blkno = idesc->id_blkno;
114
115	for (nfrags = idesc->id_numfrags; nfrags > 0; blkno++, nfrags--) {
116		if (chkrange(blkno, 1)) {
117			res = SKIP;
118		} else if (testbmap(blkno)) {
119			for (dlp = duplist; dlp; dlp = dlp->next) {
120				if (dlp->dup != blkno)
121					continue;
122				dlp->dup = duplist->dup;
123				dlp = duplist;
124				duplist = duplist->next;
125				free((char *)dlp);
126				break;
127			}
128			if (dlp == 0) {
129				clrbmap(blkno);
130				n_blks--;
131			}
132		}
133	}
134	return (res);
135}
136